package com.jiage.toolutil.utils;

import android.util.Base64;

import java.io.UnsupportedEncodingException;

public class SDBase64 {
    private static byte[] base64DecodeChars = new byte[]
            {-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
                    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -1, -1, -1, 63, 52, 53,
                    54, 55, 56, 57 , 58, 59, 60, 61, -1, -1, -1, -1, -1, -1, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11,
                    12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1, -1, 26, 27, 28, 29,
                    30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1,
                    -1, -1, -1};

    public static byte[] encodeToByte(String content) {
        byte[] result = null;
        try {
            result = Base64.encode(content.getBytes("UTF-8"), Base64.DEFAULT);
        } catch (Exception e) {
            result = null;
        }
        return result;
    }

    public static byte[] encodeToByte(byte[] content) {
        byte[] result = null;
        try {
            result = Base64.encode(content, Base64.DEFAULT);
        } catch (Exception e) {
            result = null;
        }
        return result;
    }

    public static String encodeToString(byte[] content) {
        String result = null;
        try {
            result = Base64.encodeToString(content, Base64.DEFAULT);
        } catch (Exception e) {
            result = null;
        }
        return result;
    }

    public static String encodeToString(String content) {
        String result = null;
        try {
            result = Base64.encodeToString(content.getBytes("UTF-8"), Base64.DEFAULT);
        } catch (Exception e) {
            result = null;
        }
        return result;
    }

    public static String decodeToString(String content) {
        String result = null;
        try {
            byte[] byteResult = Base64.decode(content, Base64.DEFAULT);
            result = new String(byteResult, "UTF-8");
        } catch (Exception e) {
            result = null;
        }
        return result;
    }

    public static String decodeToString(byte[] content) {
        String result = null;
        try {
            byte[] byteResult = Base64.decode(content, Base64.DEFAULT);
            result = new String(byteResult, "UTF-8");
        } catch (Exception e) {
            result = null;
        }
        return result;
    }

    public static byte[] decodeToByte(String content) {
        byte[] result = null;
        try {
            result = Base64.decode(content, Base64.DEFAULT);
        } catch (Exception e) {
            result = null;
        }
        return result;
    }

    public static byte[] decodeToByte(byte[] content) {
        byte[] result = null;
        try {
            result = Base64.decode(content, Base64.DEFAULT);
        } catch (Exception e) {
            result = null;
        }
        return result;
    }

    /**
     * 解密
     *
     * @param str
     * @return
     */
    public static byte[] decode(String str) {
        try {
            return decodePrivate(str);
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
        return new byte[]{};
    }

    private static byte[] decodePrivate(String str) throws UnsupportedEncodingException {
        StringBuffer sb = new StringBuffer();
        byte[] data = null;
        data = str.getBytes("US-ASCII");
        int len = data.length;
        int i = 0;
        int b1, b2, b3, b4;
        while (i < len) {

            do {
                b1 = base64DecodeChars[data[i++]];
            } while (i < len && b1 == -1);
            if (b1 == -1)
                break;

            do {
                b2 = base64DecodeChars[data[i++]];
            } while (i < len && b2 == -1);
            if (b2 == -1)
                break;
            sb.append((char) ((b1 << 2) | ((b2 & 0x30) >>> 4)));

            do {
                b3 = data[i++];
                if (b3 == 61)
                    return sb.toString().getBytes("iso8859-1");
                b3 = base64DecodeChars[b3];
            } while (i < len && b3 == -1);
            if (b3 == -1)
                break;
            sb.append((char) (((b2 & 0x0f) << 4) | ((b3 & 0x3c) >>> 2)));

            do {
                b4 = data[i++];
                if (b4 == 61)
                    return sb.toString().getBytes("iso8859-1");
                b4 = base64DecodeChars[b4];
            } while (i < len && b4 == -1);
            if (b4 == -1)
                break;
            sb.append((char) (((b3 & 0x03) << 6) | b4));
        }
        return sb.toString().getBytes("iso8859-1");
    }

}
